For questions about the geodetic functionality of Mathematica, including the functions FromDMS, GeoPosition, GeoDistance, GeodesyData, and FindGeoLocation.

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43
votes
5answers
9k views

How do I plot coordinates (latitude and longitude pairs) on a geographic map?

I'm attempting for the first time to create a map within Mathematica. In particular, I would like to take an output of points and plot them according to their lat/long values over a geographic map. I ...
21
votes
3answers
901 views

How accurate is GeoDistance?

Two years ago I tried an evaluation copy of Mathematica. I reported various inaccuracies in the GeoDistance routine to which I never received any fix. Could ...
19
votes
1answer
339 views

Can Mathematica Export Shapefiles?

Mathematica is great at importing ESRI shapefiles (.shp). Import["http://exampledata.wolfram.com/usamap.zip", "Graphics"] But it seems like it's a glaring ...
18
votes
3answers
1k views

How can I list all the 'countries 4000 km far from current location'?

A friend said to me on Facebook that she is 4000km away. So I want to try to guess where she is. How can I find which countries are a given distance from my current location?
16
votes
1answer
229 views

How to use WikiMapia as GeoServer?

I wish to use the Wikimapia map as background in GeoGraphics. According to the Wikimapia Docs, Wikimapia's URL is encoded as follows: An example Wikimapia URL ...
16
votes
2answers
1k views

How do I map a Mollweide projection onto a sphere?

I have this Mollweide projection of the Earth circa 600 million years ago (http://jan.ucc.nau.edu/~rcb7/370moll.jpg).(1) I want to map this onto a sphere. My results have big black splotches in ...
13
votes
4answers
222 views

Administrative Divisions bordering a geographic region (e.g. an ocean)

Update 3 I've worked out a solution that is bearable for a small number of subregions in the neighbour and added it as an answer. I'm going to make a post for optimisation help. Update 2 For a ...
11
votes
2answers
306 views

How to make geometric intersection faster for geographic borders?

I have developed a solution to identify geographic regions bordering a region in this post (94723). Can this functionality be made to execute any faster? Find which entities in a set border other ...
9
votes
1answer
196 views

GeoProjection for astronomical data - wrong ticks

Here is an excellent answer to what I wanted to do, and it works like a charm. Unfortunately, when I want to change it a bit, it fails. For setting the stage, here is the datafile, and this is my ...
8
votes
3answers
997 views

plotting a {{Latitude,Longitude}} list on top of a GIS shapefile

I have a dataset composed of points specified in {Latitude,Longitude} format. Call it latlong for the purposes of this question. It displays properly with ...
8
votes
1answer
122 views

Does GeoGraphics support Elliptical Mercator projection?

When working on the answer to this question I found that GeoGraphics seemingly uses by default the Spherical Mercator projection (also known as "Web Mercator") ...
8
votes
1answer
1k views

How can you use and convert Gauss-Krüger-Coordinates in Mathematica?

I am given geographic data in the form of Gauss-Kr├╝ger-Coordinates and would like to calculate distances with them and convert them to longitude/latitude coordinates in another system for plotting ...
7
votes
1answer
1k views

How to convert from and to UTM coordinates in Mathematica?

How to use the UTM coordinate system (northing, easting) in Mathematica using the built-in functions (GeoPositionENU, ...
7
votes
1answer
207 views

Getting the coordinates of GeoDisk[] and similar Mathematica 10 GeoObjects

I'm a big fan of the new Mathematica 10 geographic capabilities and functions such as GeoDisk[], GeoCircle[] and others. One limitation of these functions, however, is the transformation of the actual ...
6
votes
1answer
31 views

Behavior of $GeoLocationCity within a Block

According to the V10 documentation on $GeoLocation, \$GeoLocationCity gives the city entity for the current setting for \$GeoLocation And since this is ...
4
votes
1answer
162 views

Convert Locator (x,y) values to Lat/Lon as per GetCoordinates on Map

I want to convert the (x,y) coordinates you get from using a locator on a map to Lat/Lon coordinates - exactly like the GetCoordinates tool does when you right click on a map. ...
3
votes
1answer
53 views

Documentation on GeoGridPosition

Wondering where I can find more documentation on GeoGridPosition. Specifically, what formulas does Mathematica use to transform lat/long points to x/y coordinates? ...
3
votes
1answer
381 views

Calculate geo location based on distance from other locations

Given a list of entities (or GeoPositions) and their distances from a particular location, how do I find that location's ...
2
votes
1answer
62 views

Plotting Vectors in Mathematic at lat/long positions

I have some current data that I want to plot in Mathematica. The first two columns are the latitude and longitude respectively (longitudes are negative b/c it is west of the prime meridian and all ...
2
votes
0answers
146 views
2
votes
0answers
117 views

Lat-lon contour plots using geographic projections

I need to create contour plots of (lat,lon) quantities projected on geographic regions using different projections. Usually considering the entire world or hemispheres. Coastlines need to be present ...
1
vote
2answers
163 views

Matrix of boundary distance between countries

I'm trying to generate a matrix of the boundary distances between all countries. First thing I tried was GeoDistance: ...
1
vote
1answer
326 views

{Latitude, Longitude} to Transverse Mercator projection

I have a shapefile with the following "CoordinateSystemInformation": ...
1
vote
2answers
95 views

Converting lat/long to x/y coordinates, to generate random variates from a Bivariate Normal Distribution [closed]

I am trying to convert latitude and longitude points to x/y coordinates, generate random variates from a bivariate normal distribution, and then convert those random x/y points back into latitude ...
1
vote
1answer
86 views

Geomarker Scaling

Struggling to get a 3d cylinder to scale properly on a street map. I want to use the stacked cylinder as a custom pin. ...
1
vote
1answer
209 views

Correct usage of GeoPosition

My goal is to trace a ray down to the ground. I have done: ...
1
vote
1answer
491 views

How to calculate the distance between UTM-projected coordinates?

My coordinates are projected using the following projection: proj= {"UTMZone32", {"GridOrigin" -> {500000, 0}, "CentralScaleFactor" -> 0.9996}}; Now I wish ...
1
vote
0answers
55 views

Convert large KML coordinate datasets to UTM [closed]

I was wondering if there are ways to convert massive amounts of KML coordinates into UTM coordinates using Mathematica. Other programs would also be acceptable. Thanks. I have the KML file from ...
1
vote
0answers
90 views

Plot Multibeam bathymetry grid

I don't speak Mathematica very well, but I am sure I could do great things with this programming language! I will delete this question if it is a duplicate, but I will be glad if you could point me ...
1
vote
0answers
87 views

Geodesy without units?

Suppose I'm interested in the latitude of Los Angeles and I do the following: ...
-1
votes
1answer
60 views

How do I plot lat/long points in the Atlantic Ocean? [closed]

How do I plot lat/long points on the water? Such as the Atlantic Ocean? Here are some points I'm trying to plot: ...